Note: Greek forms are capitalized, Latin in normal case.

Latin Prefix/ GREEK PREFIX	Meaning
A-, AN-	"alpha privative", a negative
ab-	away from
ad-	to, towards, near
ambi-	both
ANA-	up, back again, throughout, against
ante-	before, in front of
ANTI-	against
APO-	away from
bi-/bis-	twice, double
CATA-	down, across, under
circum-	around
con-	with
contra-	against
de-	down, from, away from
DI-	two, twice, double
DIA-	through
dis-	apart, removed
DYS-	hard, difficult, bad
e-, ex- (Lat.) EC- EX- (GK.)	out of
ECTO-	outside
EXO-	outside, outward
EN-	in
endo-	within
epi-	on, upon
extra-	outside, beyond, in addition to
EU-	well, good, easy
HEMI-	half
HYPER-	over, above,
HYPO-	below, under
in-	in, into, on You often see this prefix as im. Used with verbal roots.
in-	not; occasionally, beyond belief
infra-	below
inter-	between
intro-	within
intus-	within
META-	with, after, beyond
non-	not
OPISTHO-	behind
PALIN-	again
PARA-	along side of, beside
per-	through, thorough, complete
PERI-	around, near
post-	after, behind
pre-	in front of, before
PRO-	before, in front of
PROSO-	onwards, in front
re-	back, again
retro-	backward
semi-	half
sub-	under, below
super-, supra-	above, upper
SYN-	with
trans-	across
ultra-	beyond

Adjective + Root + Suffix=Word

The following tables contain Greek and Latin adjectives in the form used to combine with English words or with other Latin or Greek parts to make English words -- like megalomaniac or macroeconomics, to take examples from the top of the table.

GREEK & Latin	Meaning in English
MEGA-, MEGALO-, MAKRO-; magni-, grandi-	big
MICRO-; parvi-	little
MACRO-, DOLICHO; longi-	long
BRACHY-; brevi-	short
EURY, PLATY-; lati-	wide
STENO-; angusti-	narrow
CYCLO-, GYRO; circuli-	round
quadrati- rectanguli-	square
PACHY-, PYCNO-, STEATO-; crassi-	thick
LEPTO-; tenui-	thin
BARY-; gravi-	heavy
SCLERO-, SCIRRHO-; duri-	hard
MALACO-; molli-	soft
HYGRO-, HYDRO-; humidi-	wet
XERO-; sicci-	dry (Xerox®)
OXY-; acri-	sharp
CRYO- PSYCHRO-; frigidi-	cold
THERMO-; calidi-	hot
DEXIO-; dextri-	right
SCAIO-; scaevo- levi, sinistri-	left
PROSO-, PROTO-; frontali-	front
MESO-; medio-	middle
POLY-; MULTI-	many
OLIGO-; pauci-	few
STHENO-; validi-, potenti-	strong
HYPO-; imi-, intimi-	bottom
PALEO-, ARCHEO-; veteri-, seni-	old
NEO-, CENO-; novi	new
CRYPTO-, CALYPTO-; operti-	hidden
TAUTO-; identi-	same
HOMO-, HOMEO-; simili-	alike
EU-, KALO-, KALLO-; boni-	good
DYS-, CACO-; mali-	bad
CENO-, COELO-; vacuo-	empty
HOLO-; toti-	entirely
IDIO-; proprio-, sui-	one's own
ALLO-; alieni-	another's
GLYCO-; dulci-	sweet
PICRO-; amari-	bitter
ISO-; equi-	equal
HETERO-, ALLO-; vario-	different

Colors

A medical example of a Greek-based color word is erythrokinetics (e·ryth·ro·ki·net·ics), which Your Dictionary Medical Definitions defines as "A study of the kinetics of red blood cells from their generation to destruction."

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